

root { 
    display: block;
}
.khung{
    margin: 0 auto ;
    width: 851px;
    height: 3000px;
    
}
#tr{
    margin-top: 10px;
    text-align: center;
    background-color: #0033ff;
    color:#FFF;
}
h2{
    color: #000000;
    font-family: tuyhoa;
}
nav{
    margin: 0px auto;
    padding: 0px;
}
nav ul{
   padding-left:  20px;
}
nav ul li{
    float: left;
    list-style-type: none;
    padding: 5px;
    margin: 5px;
    color: #ccffff;
}
nav ul li a{
    text-decoration: none;
    padding-left: 10px;
    padding-right:  10px;
    color: #0033ff;
    border: 1px solid #0033ff;
}
nav ul li a:hover{
    color: #ff0000;
    background-color: #FFF;
}
.menu{
    
    	width:851px;
	height:50px;
        margin-bottom: 10px;
        background-color: #330066;
}
.menu ul{
     margin-left: auto;
}

.menu ul li{
        margin-top: 15px;
	display:inline;
	float:left;
	}
.menu ul li a{
	color:#FFF;
	text-decoration:none;
	padding-top:5px;
	padding-left:10px;
	padding-right:10px;
	padding-bottom:5px;
	margin:1px;
        background: #99ffff;
        border-radius: 3px;
	}
.menu ul li a:hover{
    background-color: #990000;
    color: #00cc00;
}
.thanh{
    background-color: #990000;
    width:851px;
    height: 5px;
    margin-top: 20px;
    
}
.hinh{
    background-image: url(../public/image/hinh.jpg);
    width: 851px;
    height: 314px;
    background-repeat:no-repeat;
}
.footer{
        padding-top: 5px;
        color: #ffffff;
        text-align: center;
        background-color: #3A7ABE;
	height:60px;
	clear:both;
	}
  




.menu li ul a{
margin-left:-5px;
}

.menu li ul{
border-radius: 10px;

position:absolute;
display:none;
width:100px;
height: 170px;
}

.menu li li{
width:150px;
}

.menu li:hover ul{
display:block;
}